1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cefe1fce791ca0122323065168fe94cf0fc44e7d0985fe8d0aa7e85605640c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/048173fb-3566-4e64-a001-fdddc911d1a7.json and https://artists.proofprofile.net/proofs/artist/048173fb-3566-4e64-a001-fdddc911d1a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66343d43c7cb60188a12068df9db5aa58ae8787a24ce3d5e4625d2ed075c6405. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB22306804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb8b3166d46ca9799dff75590015e19878b77e3a75521244b86c25d856de6ee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYY2436522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b50e0e72274328dd41fe51a275f05424644c21340f93354dd58f142fbcde2ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82410677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a19354eb5e51b23adb298fd0183f47cae5978b360fa2e0d4be9aea3668651e2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2456603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a19354eb5e51b23adb298fd0183f47cae5978b360fa2e0d4be9aea3668651e2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2456603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7b46f043b5fba43d88f244957c0568b13a04d1a01a292fafad0925749b3100. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52455524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f8795fdfbb3de6e19b9a36d87b38af5017bd1d38359337a54cc60860ff878c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFL2416881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747b51543f8fda008ab491be81fc01e1b3f5305d314f787886d60e3be2af63cb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82564489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c065a0417c04a254590d6e7e1765fde4e7b2ab41414dcf2157173011a18dfc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN92555316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e17708d91a4077b1c5339c8104812a40ea7d5318694c4ee40d568e72858b18. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2540839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdd0bdd5a400562df6977f38be130d52dd9f5bc778efd0b0404dd2d55a63053. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6N2484043.